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Anonymous samantacastillo
wrote...
2 weeks ago
1) SEE FIRST PHOTO PLEASE


2) Which of the following statements correctly identifies the difference between plant and animal cell division?

a. Both plant and animal cells undergo mitosis and cytokinesis, but they lack the interphase.

b. The cell walls of plants prevent the process of cytokinesis.

c. Plant cells lack centromeres, and they form a cell wall to produce two daughter cells.

d. Plants cells lack centrioles, and they form a cell plate during cytokinesis.


3) Uncontrolled and rapid cell division due to a mutation in DNA is called

a. Polyploidy

b. Trisomy 21

c. Cancer

d. DNA replication




4) Which of the following correctly identifies the hormones that promote the cell cycle (growth, mitosis, and cytokinesis, respectively)?

a. hCG, ADH, prolactin

b. hGH, testosterone, thyroxine

c. FSH, oxytocin, aldosterone

d. Cortisol, PTH, insulin




5) SEE SECOND PHOTO ATTACHED


6) Cells represented in stage 2 are

a. polyploid cells

b. somatic cells

c. haploid cells

d. gametes


7)  SEE THIRD PHOTO ATTACHED

C) Which of the following stages illustrate metaphase?

a. 2 and 6

b. 3 and 7

c. 4 and 8

d. 1, 5, and 8

e. 3 and 4

D)  Which of the following stages illustrate the anaphase?

a. 3 and 7

b. 4 and 8

c. 3 and 4

d. 1, 5, and 8

e. 2 and 6


8) Colchicine is a medication most commonly used to treat inflammatory arthritis called gout. Colchicine interferes with the functioning of the spindle apparatus during mitosis by preventing the chromatids from lining up in the centre of the cell. In a cell, the spindle fibres are used to control the movement and segregation of chromosomes during division.

Which stage of mitosis is affected by Colchicine?


9) Chemotherapy is a form of drug therapy given to cancer patients. One effect of chemotherapy drugs is that it stops DNA replication from occurring. If DNA cannot replicate, the cells cannot divide properly.

The stage of the cell cycle most affected by drugs that prevent DNA replication is __(1)___ and the type of division that cancer cells use to divide is _____(2)____.

a.               Stage (1)                                              Type of Division (2)
                     S                                                                Mitosis

b.             Stage (1)                                               Type of Division (2)
                     S                                                                 Meiosis

c.             Stage (1)                                            Type of Division (2)
                    G1                                                                Mitosis

d.           Stage (1)                                                Type of Division (2)
                   G1                                                                 Meiosis





10) Onion meristem cells complete a cell cycle in 800 minutes. Calculate the portion of the cycle spent in prophase.

Number of Onion Meristem Cells in Each Phase

     Phase                                                   Specimen 1
 Interphase                                                      328

  Prophase                                                         70

  Metaphase                                                       22
 
 Anaphase                                                         18

 Telophase                                                          15
 
Answer: minutes

Record your answer as a whole number.



11) Onion meristem cells complete a cell cycle in 500 minutes. Calculate the portion of the cycle spent in telophase.

     Phase                         Specimen 1
   Interphase                       75

   Prophase                           12

 Metaphase                           4

 Anaphase                            2

  Telophase                           5

Answer: minutes
Record your answer as a whole number.
Record your answer as a whole number.

Record your answer as a whole number.
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Answer verified by a subject expert
Anonymousbio_man
wrote...
2 weeks ago
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#1

Looks like the metaphase plate. So, metaphase.

#2

In plant cells centrioles are absent, whereas they are present in animal cells. Due to the rigidity of the cell wall, cleavage furrow such develops between animal daughter cells can't be formed. Instead,  a dividing structure known as the  cell plate grows outward from the center of the cell to the parental plasma membrane with which it will fuse forming a new, doubled cell wall between plant daughter cells.

Plants cells lack centrioles, and they form a cell plate during cytokinesis.

#3

Cancer

#4

(b)

#5

The correct diploid number is 4.

#6

In the stage 2, two daughter cells are formed from a parent cell. And each daughter cells have 4 chromosomes, 2 black and 2 white, so these cells are diploid and are products of mitosis ( equational division, both parental cells and daughter cells have same number of chromosomes).

Somatic cells are diploid.

somatic cells

#7

2 and 6

D) 

3 and 7

#8

Stage Stages 3 and 7

Phase metaphase

Colchicine interferes with the formation of spindle fibers which only takes place in metaphase of cell cycle so that's why other options are wrong

#9

c.             Stage (1)                                            Type of Division (2)
                    G1                                                                Mitosis

#10, #11

Answer) 124

Explanation:

Total number of cells are: 328+ 70+ 22+ 18+15= 453

The number of cells in prophase are 70.

The time spent in prophase in cell cycle is (70/453)×800= 123.62 ~ 124 minutes.

Answer) 26

Total number of cells: 75+12+4+2+5= 98

The number of cells in telophase are 5

Total time is 500 minutes.

The time in telophase is (5/98) ×500= 25.51 ~ 26 minutes.
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Anonymous Author
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A week ago
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